Question

if 12 21 72 126 are in proportion then

Answer 1

Answer:

$12\times 126 = 21\times 72$

Step-by-step explanation:

Since, If four numbers m, n, o and p are in a proportion,

Then,

$\frac{m}{n}=\frac{o}{p}$

Here, m = 12, n = 21 o = 72 and p = 126,

By substituting the values,

We get,

$\frac{12}{21}=\frac{72}{126}$

$\implies 12\times 126 = 21\times 72$

That is, first × fourth = second  × third

Answer 2

Answer:  

Step-by-step explanation:

Since, If four numbers m, n, o and p are in a proportion,

Then,

Here, m = 12, n = 21 o = 72 and p = 126,

By substituting the values,

We get,

That is, first × fourth = second  × third